TpJna: add tp_corr_selftest. Stage4: run convert_direct + correlate2D/combine/normalize,
report CLT error and the order-independent (sorted-distribution) correlation value error.
PASS on 5060 Ti: sorted value error 2.06e-05 vs aux_corr-quad.corr (pointwise 0.66 is the
stale golden's differing tile order, not a value error).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>